United Kingdom

A 21-year-old female asked:

will a vanishing twin (lost at 7 weeks) affect first trimester downs syndrome testing with blood test and ultrasound?

1 doctor answer • 1 doctor weighed in

Dr. Carline Louis-Jacques answered

Obstetrics and Gynecology 33 years experience

Vanishing twin: No, it would not affect your test result. Ultrasound would show it for a while, but the developing twin will eventually grow big enough to hide it from view.

2919 viewsAnswered >2 years ago

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Related questions

A 48-year-old member asked:

Has any one had the blood test positive for Down syndrome but then ultrasound showed the baby fine?

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A 34-year-old female asked:

I had a normal first trimester screening and harmony prenatal test. Is an AFP blood test necessary? Can it come back high risk?

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My daughter has a large throid. Her blood test came back normal. Should i still be worried and ask for an ultrasound and additional testing?

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7.4 week ultrasound showed a healthy baby. But the transvaginal ultrasound showed a glimpse of something else besides baby.It had blood flow .Twin?

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A 27-year-old member asked:

My first ultrasound showed an empty gestational sac (around week 5-7, unsure) and my OBGYN had 2 blood tests drawn. #1 showed 11.6K mUI/ml and #2 showed 10.2K mUI/ml, a slight drop. I'm anxious that this may be a miscarriage - could you advise..?

1 doctor answer • 1 doctor weighed in

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Last updated May 5, 2015

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